A low-complexity energy disaggregation method: performance and robustness

Hana Altrabalsi, Jing Liao, Lina Stankovic, Vladimir Stankovic

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

3 Citations (Scopus)
224 Downloads (Pure)

Abstract

Disaggregating total household's energy data down to individual appliances via non-intrusive appliance load monitoring (NALM) has generated renewed interest with ongoing or planned large-scale smart meter deployments worldwide. Of special interest are NALM algorithms that are of low complexity and operate in near real time, supporting emerging applications such as in-home displays, remote appliance scheduling and home automation, and use low sampling rates data from commercial smart meters. NALM methods, based on Hidden Markov Model (HMM) and its variations, have become the state of the art due to their high performance, but suffer from high computational cost. In this paper, we develop an alternative approach based on support vector machine (SVM) and k-means, where k-means is used to reduce the SVM training set size by identifying only the representative subset of the original dataset for the SVM training. The resulting scheme outperforms individual k-means and SVM classifiers and shows competitive performance to the state-of-the-art HMM-based NALM method with up to 45 times lower execution time (including training and testing).
Original languageEnglish
Title of host publication2014 IEEE Symposium on Computational Intelligence Applications in Smart Grid (CIASG)
Place of PublicationPiscataway, NJ.
PublisherIEEE
Pages1-8
Number of pages8
DOIs
Publication statusPublished - 9 Dec 2014
EventIEEE Symposium on Computational Intelligence Applications in Smart Grid - Orlando, United States
Duration: 9 Dec 201412 Dec 2014

Conference

ConferenceIEEE Symposium on Computational Intelligence Applications in Smart Grid
Abbreviated titleCIASG 2014
CountryUnited States
CityOrlando
Period9/12/1412/12/14

Keywords

  • complexity theory
  • feature extraction
  • hidden Markov models
  • home appliances
  • support vector machines

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